Means for supporting the mantles in inverted incandescent gas-lamps.



PATBNTED FEB. '7, 1905.

J. BRIDGBR.

MEANS FOR SUPPORTING THE MANTLBS IN INVERTED INGANDESGENT GAS LAMPS.

APPLICATION FILED JULY 18, 1904.

Patented February '7, 1905.

'NTTED STATES PATENT OFFICE.

JAMES BRIDGER, OF LONDON, ENG-LAND, ASSIGNOR TO THE NElV INVERTED INCANDESOEN'II GAS LAMP COMPANY, LIMITED. OF

LONDON, ENGLAND.

MEANS FOR SUPPORTING THE MANTLES IN INVERTED lNCANDESCENT GAS-LAMPS.

SPECIFICATION forming part of Letters Patent No. 781,997, dated February '7, 1905. Application filed Yuly 18, 1904:. Serial No. 217,050.

In all ZU/LONL nmy concern.-

Be it known that I. J AMES BRIDGER, a subject of the King of Great Britain, residing at 23 Farringdon avenue, in the city of London, England, have invented new and useful Improved Means for Supporting the Mantles in Inverted Incandescent Gas-Lamps, of which the following is a specification.

This invention relates to improved means I or support-s whereby the mantles in inverted incandescent gas-lamps are more securely retained in their proper position relatively to the burner than heretofore and whereby at the same time their accurate adjustment and engagement are insured. To this end the mantle-supporting ring (of refractory material or metal) is formed or provided with small blocks or distance-pieces (say three) from which spring or branch supporting devices or arms (also of refractory material or metal) of such a shape or formation in cross-section as to straddle or fit over or upon or into a corresponding number of triangular or equivalent shaped projections or lugs near the lower end of the burner-tube, or said supportingarms are formed at their inner end with a notch, adapted to engage the upper ends or apices of the angular lugs or projections on the burner-tube; and in order that the invention may be readily understood I will now describeit fully with reference to the annexed drawings, which show examples of various constructional forms, and wherein- Figure 1 is an elevation showingone form of the improved means for supporting the mantle in place on the burner-tube of an inverted incandescent gas-lamp. Fig. 2 is a detached view in elevation of the burner-tube, showing the improved form of lugs or projections thereon to receive the supporting-ring and its mantle. Fig. 3 is a cross-section thereof on the line A B of Fig. 2. Fig. 4 is an elevation, and Fig. 5 a plan, of the mantle-carrying ring and its improved supporting-arms. Figs. 6 and T are an elevation and a plan, respectively, of a mantle-ring provided with a modified form of supporting-arms. Figs. 8 and 9 are an elevation and a plan, respecl l l tively, of a mantle-ring provided with a further modified form of supporting-arms. Fig. 10 is an elevation of a mantle-ring having supporting-arms of semicircular cross-section, and Fig. 11 is an elevation of a burner-tube provided with correspondingly-shaped lugs or projections. Fig. 12 is an elevation of a mantle-ring provided with a further modified form of supporting-arms.

Referring first to Figs. 1 to 5, (z is the mantle-supporting ring, formed, as usual, with a convenient number of small blocks or distance-pieces b, from which branch radiallydisposed horizontal arms 0, and f is the mantle, which is secured to the ring a in any wellknown manner. The arms 0 are according to this invention made triangular-that is to say, of the shape of an inverted V in crosssectionand are adapted to straddle or lit close over or upon correspondingly-shaped triangular lugs or projections (1, formed near the lower end of the burner-tube a, as shown in Figs. 1 and 2. It will thus be readily understood that owing to the angular construction of these arms and lugs their accurate adjustment and engagement will be effectively secured by the comparatively large contacting surfaces provided thereby, and hence the risk of their becoming accidentally displaced by vibration or other causes will be considerably minimized if not entirely obviated. The fitting together of the ring a, (with its mantlef) and the burner-tube e is effected as ordinarily in inverted incandescent gas-lamps, and therefore needs no description.

According to the modified arrangement shown in Figs. 6 and 7 the arms (3 are triangular that is to say, of an inverted-V shapeonly at their inner ends, their outer ends 0 being solid and rectangular in cross-section. The arms are thus rendered stronger on their outer ends and are not so liable to break or chip off.

Referring now to Figs. 8 and 9, which show a further modification, the arms 0 3.113 flat and of rectangular shape and have their inner ends formed with triangular notches or reentering angles 0 These arms, as will be readily understood, fit over and rest upon the upper portions or sides of the lugs or projections cl on the burner-tube 6. (Shown in Figs. 1 and 2.) It will of course be understood that the lugs instead of having the triangular shape shown in Figs. 1 and 2 may be made in the form of tetrahedra, and the notches may be chamfered on their under sides, so as to afford an extended surface for contact with the lugs.

Instead of the supporting-arms being of the form of an inverted \I, as in Figs. 1, 4, 5, 6, and 7 they may be of semicircular, segmental, or are shape in cross-section and engage correspondinglyshaped lugs on the burner-tube. As shown in Fig. 10, the arms 0 are semicircular in cross-section, and the lugs (Z, Fig. 11, are accordingly shaped to receive said arms, and so support the ring and its mantle.

It is obvious that the parts 0 and (Z (shown on the drawings and which are to be in engagement, so as to support the mantle) may be reversed that is to say, the supportingarms 0' may be of V shape, as shown in Fig. 12, and the lugs be correspondingly shaped, so that the arms would then rest in the angular recesses formed in the lugs.

If preferred, the supporting-arms described in any of the above arrangements may be connected directly to the ring, thereby dispensing with the blocks 6, and instead of the lugs (Z being integral with the burner-tube they may be formed on a ring or band adapted to be afiixed in any suitable manner to said tube. In all the foregoing arrangements the supporting-arms project outwardly to such an extent that when the ring, with its mantle attached thereto, is packed in boxes for sale or transit the said arms rest on the internal ledge of the box, and so prevent injury to the mantle; but this is common to all mantle-supporting rings and forms no part of the invention.

Having now described my said invention, I claim 1. In a mantle-supporting device for inverted incandescent gas-lamps, the combination of a burner-tube having lugs projecting therefrom and a gravitating ring provided with arms to loosely engage the said lugs, the arms and lugs having a form and cross-sectional contour to permit the ring to settle, by gravitation, into a position of secure engagement with the burner-tube.

2. A burner-tube for inverted incandescent gas-lamps provided with lugs or projections extending outwardly therefrom, and a mantlesupporting ring having inwardly-extending arms corresponding in shape to the lugs and loosely engaging over the latter.

3. A burner-tube for inverted incandescent gas-lamps, provided with outwardly-extending projections, and a gravitating mantle-supporting means having arms of a contour corresponding to that of the projections, the said arms being adapted to fit the said projections and remain intact with respect thereto without other securing means.

4. The combination of a burner-tube for inverted incandescent gaslamps having outwardly-projecting angular lugs, and a mantlesupporting ring having angular-shaped arms to engage the said lugs, the arms straddling the lugs.

5. The combination of a bu rner-tube for inverted incandescent gaslamps having out- 'wardly-projecting lugs, and a mantle-supporting means having inwardly-projecting arms shaped to extend over and straddle the said lugs and be seated on the latter by gravity.

6. The combination of aburner-tube having triangular lugs projecting outwardly therefrom, and a mantle-supporting means having projecting arms with horizontal recessed members to fit over the said lugs.

7 The combination of a burner-tube for an inverted incandescent gas-lamp having outwardly-extending angular lugs spaced apart from each other, and radially disposed with respect to the tube, and a mantle-supporting means having horizontally-disposed angular recessed members held above the same and regularly spaced apart, the said members loosely bearing on the said lugs.

8. The combination of a burner-tube for incandescent gas-lamps having radial projections and a gravitating mantle-supporting means provided with radially-disposed holding members recessed to loosely engage the said projections.

9. The combination of a burner-tube for inverted incandescent gas-lamps having projecting means radially disposed thereon, and a supporting means for a mantle having inwardly-projecting members with horizontal elements to gravitatingly engage the said radially-projecting means of the burner-tube.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JAMES BRIDGER.

WVitnesses:

GEORGE ERNEST MINTERN, H. D. JAMEsoN. 

